Votes in West Belfast are less powerful than those in any other Northern Irish constituency due to the first past the post system.

According to the Voter Power Index, a website which campaigns for electoral reform, a vote in West Belfast is worth the equivalent of 0.008 normal votes due to it being a very safe seat.

The index takes into account the marginality of each constituency and constituency size in order to calculate where votes will have the most influence next Thursday.

In a proportional representation system every vote would be equivalent to one vote, however, due to the first past the post system in which leads to a lot of safe seats, the average UK voter actually commands the equivalent of 0.31 votes when they cast their ballots.

This means that although a vote in Belfast West is worth the equivalent of 0.008 votes according to the index, it is actually 38 times less powerful than a vote in the average constituency.

Only three other constituencies out of a total of 650 have votes that are less powerful than this.

In contrast, a vote in Fermanagh and South Tyrone is worth 3.3 times a vote in the average constituency making a votes their the 12th most influential in the UK.

The constituency where voters have the least power in the UK is Knowsley in Merseyside. The Voter Power Index estimates that vote in Knowsley is 61 times less powerful than a vote in the average constituency.

At the other end of the scale, the constituency where voters have the most power in the UK is Swansea West. The index estimates that vote there is 7.4 times more powerful than a vote in the average constituency.